The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X220-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø50mm bore, 220mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X220-20 is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end adjustment directly on the machine. Its rear-cap screw lets you shorten the stroke end by up to 20 mm without removing the cylinder or adding external hard stops, delivering a push force of 982 N at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa.
This 50 mm bore model uses a 20 mm diameter piston rod, PT1/4 ports, and an M16x1.5 rod thread for easy attachment. The body length A is 194 mm, and the cylinder is cushioned at both ends with a 21 mm adjustable air cushion to decelerate the load smoothly. It is part of the SCJ tie-rod family, not an ISO 15552 profile, so dimensional interchangeability is limited to another AirTAC SCJ of the same configuration.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X220-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 220 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×220 | Nominal (maximum) stroke length in mm. |
| -20 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Fine-tune the 220 mm stroke end position by up to 20 mm during initial machine setup, eliminating the need to shim or reposition the cylinder body.
Quickly adjust the stop position for a pusher or diverter on a packaging line when switching between product sizes, reducing downtime between batches.
Take up mechanical play or compensate for wear in tooling and linkages over time by slightly extending the effective stroke with the rear adjusting screw.
Choose the SCJ50X220-20 when your application needs a stroke close to 220 mm but you require the ability to dial in the exact end position during commissioning or changeovers. If 982 N of push force at 0.5 MPa is insufficient, stepping up to the 63 mm bore provides 1559 N at the same pressure. For applications that do not require field adjustment, the fixed-stroke SC50X220 is a simpler, more cost-effective alternative. A direct replacement must match the 50 mm bore, 220 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting. For strokes of this length, ensure the rod is guided externally or consider a guided cylinder if the load applies significant side force, to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
The push force is 982 N at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa. The pull force on the retract stroke is lower at 825 N at 0.5 MPa because the 20 mm piston rod reduces the effective piston area on that side.
This is a direct replacement for another AirTAC SCJ50X220-20 adjustable-stroke cylinder. It is a tie-rod design, not an ISO 15552 profile cylinder, so it will not directly interchange with profile cylinders from other brands. Ensure your mounting, port size (PT1/4), and 20 mm adjust range match.
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